Ok guys,  I've been reloading since 1980, same time I started casting boolits and shooting a muzzleloader.  But I've never reloaded a black powder cartridge.
My favorite measurer is my old RCBS Uniflow, checking things with my Ohaus scales.
I understand it's not a great idea to use the RCBS with holy black. 
So... what's my options and choices? 
I have a feeling I'm be looking for an old B&M, but I thought I'd ask. 
So mote it be
Yip

I’ve used a Belding & Mull for years, price dependent today would probably buy a new MVA. Nice B&M could cost nearly  as much as the MVA 

Boats

MVA for sure. 

Chris.

The B&M measure works well if you have a drop tube big enough for your power charge.  The Lyman 55 also works well. I have one I put a larger brass hopper on and that makes it quite nice. 
I picked up a used one from this site I think and I used it to play around to see if I could come up with a solid set up to bore out the measure to fit a brass hopper and I did. it worked quite well. 
I have been told that the Readding measure works very well also. What ever measure you choose, you will have to take it apart and clean it regularly. 
Any measure that can be adjusted to throw a large charge and hold constant measurements would work.
Sam

Also, if you have the larger Harrell's measure it will work very well with Swiss 1.5.  I bought one with an aluminum hopper from Buffalo Arms years ago.

I have a micrometer adjustable drop tube for my B&M. Bought so long ago I can’t recall were, it’s very useful. You can set a non mike tube with a dial indicator, I did before  the adjustable tube.

Rarely load Black Powder cartridges today sticking to muzzle loaders for black. The B&M reserved  for 38/55 4759 loads. 4227 15-16 grains nothing throws better than Harrell’s Schuetzen   Have another Harrell measure, one of his first, used it when shooting High Power Silhouette. Works well with large volume drops.

That’s all I know about measures.

Boats

I use my old B&M measure at home at the bench, as I have for around 4 or 5 decades for everything from 2gr. Bullseye up through massive quantities of slow burning smokeless and black. Ditto for metering black at the range/match. (For smokeless at the range/match I'm a fanboy of the Harrel's Schuetzen measure.)

I have an RCBS measure that I bought years ago in a moment of weakness which I've never used. If anybody wants it I'll sell it cheap.

I just can't fathom any powder drop simpler and more reliable than a B&M. I found a muzzle loading powder measure at Track of the Wolf years ago that will handle 100 grains or more that has an internal plunger scale you can set for different load weight. It slips perfectly into the B&M drop hole. 

Rick